also, scaling databases is not terribly difficult, it is just very "clumsy". Still, having a proper transaction manager and query planner will give you far bet

also, scaling databases is not terribly difficult, it is just very "clumsy". Still, having a proper transaction manager and query planner will give you far better performance compared to doing it on webservers. Also, aren't bsically moving the complexity of the database to the webserver? Which makes your webserver far more complex and harder to scale in comparison. Especially if you need ACID. (which is a must if you are doing anything with data storage imo).